Juveon.com is a multiplatform solution that uses many tools: marketing automation (Exact Target), Magento and WordPress, affiliates programs, Amazon, eBay, social media platforms, and blogs.
The client wanted to merge all web activity statistics into one account. It was quite complicated because of many different platform usage, subdomains, and external parties. Universal Google Analytics has really good instructions how to do it.
Magento has its own specifics. You need to manipulate with its GA.php file, otherwise, it won’t work properly. Google Analytics changed also its scripts. All web analytics settings had to be changed.